I won't put the blame on the team if they denied bounty hunters their rewards, that is Bounty Manager's job,
You have no idea what you are talking about. The manager is only a facilitator or a middle man involved in managing the campaign. If the team does not pay or wish to pay, the manager is having their hand tied to pay the hunters.
If you want to blame someone blame yourself for joining that campaign and the temptation for free money.

BM is the only law standing between bounty hunters and the team of that project, it's why I prefer joining bounties from a bounty manager with good rep, as a good BM he or she must do everything in his/her power to make sure bounty participants get their rewards
LOL this type of self-entitlement is what makes the bounty hunters arrogant and illogical.
Also know that many managers have paid out from their own pocket just because they were denied payment by the team as an act of goodwill because the manager also felt bad for the hunters. 
Dont even talk about anything related to legal, coin offering are anyway not legalized securities and so you are at your own risk on buying them or earning them in the case of bounty hunters.
I don't agree to the part where you stated that bounty is free money. Bounty is not airdrop so I don't see how it is free money. Don't forget that hunters also expend mental and material resources to promote the project. So bounty reward is payment for marketing work done.